<style>  
    .disc{  
        width:100px;  
        height:100px;  
        background-color:dimgray;  
        border-radius: 50%;  
        cursor: pointer;  
        position: absolute;  
        left:50px;  
        top:50px;    
        line-height: 100px;  
        text-align: center;  
        color: white;  
    }
    .circle{
        width:200px;
        height: 200px;
        border-radius:50%;
        background-color: red;
        cursor:pointer;
        left:100px;
        top:100px;
        position:absolute;
        text-align:center;
        line-height:200px;
    }  
    </style>
    <div class='circle'>test</div>

       
       <!-- <div class="disc">点击区域</div>  -->